Samsung One UI 9.0 & One UI 9 Watch: Complete Rollout Guide for August 7, 2026

One UI 9 Watch (Wear OS 7) and New Watches

The Galaxy Watch 9 and Galaxy Watch Ultra 2 are the first devices to ship with Wear OS 7 and One UI 9 Watch .

• Availability: Pre-orders opened July 22, and general availability for both watches began August 7, 2026 .
• Older watch support: Samsung began internal testing of One UI 9 Watch for existing models (Galaxy Watch 8, Watch 8 Classic, and Watch Ultra) in early July 2026 . The Galaxy Watch 7 and Watch 6 series are also expected to receive the update .

Five-Year Software Support Commitment

Samsung confirmed that the Galaxy Watch 9 and Galaxy Watch Ultra 2 will receive five major Wear OS upgrades and five years of security patches — the longest support commitment yet for Samsung's smartwatches . This matches or exceeds the support policies for premium Android phones.

"Galaxy Aero" — Unannounced RTOS Smartwatch Leak

During the same week of the One UI 9 rollout, code references discovered by SamMobile in the Galaxy Wearable app revealed a device codenamed "Samsung Galaxy Aero" and labeled "galaxy_rtos_watch" .

• OS choice: It uses a Real-Time Operating System (RTOS) instead of Google's Wear OS, meaning a lighter, more power-efficient system .
• Battery life: The RTOS platform is expected to deliver multi-week battery life — dramatically better than Wear OS watches .
• Positioning: The device is expected to be priced above the Galaxy Fit 4 but below the Galaxy Watch FE, filling a mid-range slot between a fitness band and a full smartwatch .
• Other details: Reports mention a Goodix GH3036 biosensor, Bluetooth Low Energy, and no NFC support . A circular screen has been mentioned in some reports . Samsung may use a proprietary RTOS or an open-source variant like FreeRTOS .
• Status: The Galaxy Aero has not been officially announced by Samsung. All information comes from code leaks published August 5–7, 2026 .

What to Expect Next

With the August 7 rollout complete for new devices, the next major milestone is the One UI 9.0 stable release for the Galaxy S26 series, likely arriving later in Q3 2026 . Older Galaxy phones (Galaxy S23 and newer, Z Fold 5 and newer) should follow later in 2026 . The Galaxy Aero remains unconfirmed, but the code references suggest Samsung may soon offer a battery-focused alternative to its premium Wear OS lineup.